ESDU Performance Series

The information provides data and methods both for the estimation of the performance of a proposed aircraft at every stage of its design, from project stage to operation, and for performance measurement.

The information on performance estimation can be used for design and development, project and research studies, pre-flight specification and, finally, the synthesis of precise operational data based on flight test results. In many cases the data give three levels of estimation method: a first approximation requiring minimum data input, a "project" method considering the major variables, and a comprehensive calculation framework for detailed estimates and synthesis of operational data.

Performance measurement information covers methods of handling flight-test measurements, including analysis using the equations of motion, reduction to standard conditions by incremental adjustment and presentations in the form of non-dimensional groups. Information is given on the correction of air-data measurements and methods of in-flight thrust measurement for turbo-jet and turbo-fan engines.

ESDU 92022
Example of statistical techniques applied to analysis of measurements of the landing airborne manoeuvre. (Multiple linear regression with two independent variables and one dependent variable.)

ESDU 93023
Example of statistical techniques applied to analysis of effects of small changes.